[R-sig-ME] Posterior probability of attitude parameters in a Rasch model

Yvonnick Noel yvonnick.noel at free.fr
Tue Jan 4 17:34:55 CET 2011

> Or you can use the irt.ability function in the MiscPsycho package that yields MLEs, EAPs, or MAPs given some item parameters
Thank you very much for pointing this library to me. It looks like this 
is what I need.

>> -----Original Message-----
>> From: r-sig-mixed-models-bounces at r-project.org [mailto:r-sig-mixed-models-
>> bounces at r-project.org] On Behalf Of Yvonnick Noel
>> Sent: Monday, January 03, 2011 11:45 AM
>> To: r-sig-mixed-models at r-project.org
>> Subject: [R-sig-ME] Posterior probability of attitude parameters in a Rasch
>> model
>> Dear all,
>> I have fitted a Rasch model to some data with glmer. From the results of
>> this analysis (namely the item difficulty estimates) I would like to
>> compute the posterior probability of any ability/attitude value, given
>> some pattern of observed responses.
>> What I would need are the quadrature points and weights that are used in
>> a glmer analysis, assuming that the latent ability values are drawn from
>> a gaussian. I can't find them in the result object slots (or did I miss
>> them?).
>> Thank you in advance for any hint,
>> Best,
>> Yvonnick Noel
>> U. of Brittany, Rennes
>> France
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